Eric,
use the PDFStamper constructor exposing the append flag and set it to true.
If you manipulate a PDF with append=false (the default), iText may
reorganize existing PDF objects and throw away unused ones; additionally it
does replace the crossreferences. This changes the PDF in such a way that
signatures are invalidated.
Regards, Michael.
Eric Lou wrote:
>
> i tried to add an annotation to a signed pdf (empty_signed.pdf) and save
> as empty_signed_tested.pdf
> when i use acrobat reader 8 to open it, it shows MyPicture1.jpeg.
>
> the code i use to add annotation as following:
>
> PdfReader reader = new PdfReader("F:/temp/pdf/empty_signed.pdf");
> FileOutputStream os = new
> FileOutputStream("F:/temp/pdf/empty_signed_tested.pdf");
> PdfStamper stamper = new PdfStamper(reader, os);
> [...]
>
> am i using the wrong way?
>
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Sent from the iText - General mailing list archive at Nabble.com.
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